# Imagick::fxImage

(PECL imagick 2, PECL imagick 3)

Imagick::fxImage — Evaluate expression for each pixel in the image

### Beschreibung

public Imagick::fxImage(string `$expression`, int `$channel` = Imagick::CHANNEL_DEFAULT): Imagick

Evaluate expression for each pixel in the image. Consult » The Fx Special Effects Image Operator for more information.

### Parameter-Liste

`expression`

  The expression.

`channel`

  Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channeltype constants using bitwise operators. Refer to this list of channel constants.

### Rückgabewerte

Liefert `true` bei Erfolg.

### Fehler/Exceptions

Wirft ImagickException bei Fehlern.

### Beispiele

Beispiel #1 Imagick::fxImage()

`<?php
function fxImage() {
$imagick = new \Imagick();
$imagick->newPseudoImage(200, 200, "xc:white");
$fx = 'xx=i-w/2; yy=j-h/2; rr=hypot(xx,yy); (.5-rr/140)*1.2+.5';
$fxImage = $imagick->fxImage($fx);
header("Content-Type: image/png");
$fxImage->setimageformat('png');
echo $fxImage->getImageBlob();
}
?>`
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